[hi] add example access

content/hi/examples/access/certificate-signing-request/clusterrole-approve.yaml

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+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: csr-approver
+rules:
+- apiGroups:
+  - certificates.k8s.io
+  resources:
+  - certificatesigningrequests
+  verbs:
+  - get
+  - list
+  - watch
+- apiGroups:
+  - certificates.k8s.io
+  resources:
+  - certificatesigningrequests/approval
+  verbs:
+  - update
+- apiGroups:
+  - certificates.k8s.io
+  resources:
+  - signers
+  resourceNames:
+  - example.com/my-signer-name # example.com/* can be used to authorize for all signers in the 'example.com' domain
+  verbs:
+  - approve
+

content/hi/examples/access/certificate-signing-request/clusterrole-create.yaml

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+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: csr-creator
+rules:
+- apiGroups:
+  - certificates.k8s.io
+  resources:
+  - certificatesigningrequests
+  verbs:
+  - create
+  - get
+  - list
+  - watch

content/hi/examples/access/certificate-signing-request/clusterrole-sign.yaml

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+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: csr-signer
+rules:
+- apiGroups:
+  - certificates.k8s.io
+  resources:
+  - certificatesigningrequests
+  verbs:
+  - get
+  - list
+  - watch
+- apiGroups:
+  - certificates.k8s.io
+  resources:
+  - certificatesigningrequests/status
+  verbs:
+  - update
+- apiGroups:
+  - certificates.k8s.io
+  resources:
+  - signers
+  resourceNames:
+  - example.com/my-signer-name # example.com/* can be used to authorize for all signers in the 'example.com' domain
+  verbs:
+  - sign

content/hi/examples/access/deployment-replicas-policy.yaml

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+apiVersion: admissionregistration.k8s.io/v1
+kind: ValidatingAdmissionPolicy
+metadata:
+  name: "deploy-replica-policy.example.com"
+spec:
+  paramKind:
+    apiVersion: rules.example.com/v1
+    kind: ReplicaLimit
+  matchConstraints:
+    resourceRules:
+    - apiGroups:   ["apps"]
+      apiVersions: ["v1"]
+      operations:  ["CREATE", "UPDATE"]
+      resources:   ["deployments"]
+  validations:
+  - expression: "object.spec.replicas <= params.maxReplicas"
+    messageExpression: "'object.spec.replicas must be no greater than ' + string(params.maxReplicas)"
+    reason: Invalid
+

content/hi/examples/access/endpoints-aggregated.yaml

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+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  annotations:
+    kubernetes.io/description: |-
+      Add endpoints write permissions to the edit and admin roles. This was
+      removed by default in 1.22 because of CVE-2021-25740. See
+      https://issue.k8s.io/103675. This can allow writers to direct LoadBalancer
+      or Ingress implementations to expose backend IPs that would not otherwise
+      be accessible, and can circumvent network policies or security controls
+      intended to prevent/isolate access to those backends.
+      EndpointSlices were never included in the edit or admin roles, so there
+      is nothing to restore for the EndpointSlice API.
+  labels:
+    rbac.authorization.k8s.io/aggregate-to-edit: "true"
+  name: custom:aggregate-to-edit:endpoints # you can change this if you wish
+rules:
+  - apiGroups: [""]
+    resources: ["endpoints"]
+    verbs: ["create", "delete", "deletecollection", "patch", "update"]

content/hi/examples/access/image-matches-namespace-environment.policy.yaml

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+# This policy enforces that all containers of a deployment has the image repo match the environment label of its namespace.
+# Except for "exempt" deployments, or any containers that do not belong to the "example.com" organization (e.g. common sidecars).
+# For example, if the namespace has a label of {"environment": "staging"}, all container images must be either staging.example.com/*
+# or do not contain "example.com" at all, unless the deployment has {"exempt": "true"} label.
+apiVersion: admissionregistration.k8s.io/v1
+kind: ValidatingAdmissionPolicy
+metadata:
+  name: "image-matches-namespace-environment.policy.example.com"
+spec:
+  failurePolicy: Fail
+  matchConstraints:
+    resourceRules:
+    - apiGroups:   ["apps"]
+      apiVersions: ["v1"]
+      operations:  ["CREATE", "UPDATE"]
+      resources:   ["deployments"]
+  variables:
+  - name: environment
+    expression: "'environment' in namespaceObject.metadata.labels ? namespaceObject.metadata.labels['environment'] : 'prod'"
+  - name: exempt
+    expression: "'exempt' in object.metadata.labels && object.metadata.labels['exempt'] == 'true'"
+  - name: containers
+    expression: "object.spec.template.spec.containers"
+  - name: containersToCheck
+    expression: "variables.containers.filter(c, c.image.contains('example.com/'))"
+  validations:
+  - expression: "variables.exempt || variables.containersToCheck.all(c, c.image.startsWith(variables.environment + '.'))"
+    messageExpression: "'only ' + variables.environment + ' images are allowed in namespace ' + namespaceObject.metadata.name"

content/hi/examples/access/simple-clusterrole.yaml

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+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  # "namespace" omitted since ClusterRoles are not namespaced
+  name: secret-reader
+rules:
+- apiGroups: [""]
+  #
+  # at the HTTP level, the name of the resource for accessing Secret
+  # objects is "secrets"
+  resources: ["secrets"]
+  verbs: ["get", "watch", "list"]

content/hi/examples/access/simple-clusterrolebinding.yaml

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+apiVersion: rbac.authorization.k8s.io/v1
+# This cluster role binding allows anyone in the "manager" group to read secrets in any namespace.
+kind: ClusterRoleBinding
+metadata:
+  name: read-secrets-global
+subjects:
+- kind: Group
+  name: manager # Name is case sensitive
+  apiGroup: rbac.authorization.k8s.io
+roleRef:
+  kind: ClusterRole
+  name: secret-reader
+  apiGroup: rbac.authorization.k8s.io

content/hi/examples/access/simple-role.yaml

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+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  namespace: default
+  name: pod-reader
+rules:
+- apiGroups: [""] # "" indicates the core API group
+  resources: ["pods"]
+  verbs: ["get", "watch", "list"]

content/hi/examples/access/simple-rolebinding-with-clusterrole.yaml

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+apiVersion: rbac.authorization.k8s.io/v1
+# This role binding allows "dave" to read secrets in the "development" namespace.
+# You need to already have a ClusterRole named "secret-reader".
+kind: RoleBinding
+metadata:
+  name: read-secrets
+  #
+  # The namespace of the RoleBinding determines where the permissions are granted.
+  # This only grants permissions within the "development" namespace.
+  namespace: development
+subjects:
+- kind: User
+  name: dave # Name is case sensitive
+  apiGroup: rbac.authorization.k8s.io
+roleRef:
+  kind: ClusterRole
+  name: secret-reader
+  apiGroup: rbac.authorization.k8s.io

content/hi/examples/access/simple-rolebinding-with-role.yaml

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+apiVersion: rbac.authorization.k8s.io/v1
+# This role binding allows "jane" to read pods in the "default" namespace.
+# You need to already have a Role named "pod-reader" in that namespace.
+kind: RoleBinding
+metadata:
+  name: read-pods
+  namespace: default
+subjects:
+# You can specify more than one "subject"
+- kind: User
+  name: jane # "name" is case sensitive
+  apiGroup: rbac.authorization.k8s.io
+roleRef:
+  # "roleRef" specifies the binding to a Role / ClusterRole
+  kind: Role #this must be Role or ClusterRole
+  name: pod-reader # this must match the name of the Role or ClusterRole you wish to bind to
+  apiGroup: rbac.authorization.k8s.io

content/hi/examples/access/validating-admission-policy-audit-annotation.yaml

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+apiVersion: admissionregistration.k8s.io/v1
+kind: ValidatingAdmissionPolicy
+metadata:
+  name: "demo-policy.example.com"
+spec:
+  failurePolicy: Fail
+  matchConstraints:
+    resourceRules:
+    - apiGroups:   ["apps"]
+      apiVersions: ["v1"]
+      operations:  ["CREATE", "UPDATE"]
+      resources:   ["deployments"]
+  validations:
+    - expression: "object.spec.replicas > 50"
+      messageExpression: "'Deployment spec.replicas set to ' + string(object.spec.replicas)"
+  auditAnnotations:
+    - key: "high-replica-count"
+      valueExpression: "'Deployment spec.replicas set to ' + string(object.spec.replicas)"

content/hi/examples/access/validating-admission-policy-match-conditions.yaml

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+apiVersion: admissionregistration.k8s.io/v1
+kind: ValidatingAdmissionPolicy
+metadata:
+  name: "demo-policy.example.com"
+spec:
+  failurePolicy: Fail
+  matchConstraints:
+    resourceRules:
+      - apiGroups:   ["*"]
+        apiVersions: ["*"]
+        operations:  ["CREATE", "UPDATE"]
+        resources:   ["*"]
+  matchConditions:
+    - name: 'exclude-leases' # Each match condition must have a unique name
+      expression: '!(request.resource.group == "coordination.k8s.io" && request.resource.resource == "leases")' # Match non-lease resources.
+    - name: 'exclude-kubelet-requests'
+      expression: '!("system:nodes" in request.userInfo.groups)' # Match requests made by non-node users.
+    - name: 'rbac' # Skip RBAC requests.
+      expression: 'request.resource.group != "rbac.authorization.k8s.io"'
+  validations:
+    - expression: "!object.metadata.name.contains('demo') || object.metadata.namespace == 'demo'"
+